/* ============================================================
   AI VERGİ — ORTAK TASARIM SİSTEMİ (tek kaynak)
   Kaynak: aivergi-design/dist/aivergi.css
   Değerler aivergi-design/tokens.json ile birebir aynıdır.
   Bu dosyayı ELLE her araçta düzenleme; canonical'da düzenle + `python3 sync.py`.
   Custom HTML araçlar: <link rel="stylesheet" href="aivergi.css">
   Streamlit araçlar:   aivergi_design.py bu dosyayı okuyup enjekte eder.
   ============================================================ */

:root {
  /* renk */
  --av-bg:           #0a0a0b;
  --av-surface:      #18181b;
  --av-surface-2:    #141416;
  --av-panel:        #0f0f14;
  --av-blue:         #3b82f6;
  --av-cyan:         #22d3ee;
  --av-grad:         linear-gradient(135deg, #22d3ee 0%, #3b82f6 100%);
  --av-amber:        #fbbf24;
  --av-amber-bg:     rgba(251,191,36,0.10);
  --av-amber-border: rgba(251,191,36,0.30);
  --av-text:         #fafafa;
  --av-text-2:       #a1a1aa;
  --av-text-3:       #71717a;
  --av-border:       #27272a;
  --av-border-soft:  rgba(255,255,255,0.08);
  --av-on-accent:    #06181c;
  /* tipografi */
  --av-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  /* boşluk */
  --av-space-1: 4px;  --av-space-2: 8px;  --av-space-3: 12px; --av-space-4: 16px;
  --av-space-5: 24px; --av-space-6: 32px; --av-space-7: 48px;
  /* form */
  --av-radius: 12px; --av-radius-sm: 10px; --av-radius-pill: 999px;
  --av-shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
  /* düzen */
  --av-container-max: 1100px;
  --av-container-narrow: 820px;
  --av-container-pad: 24px;
  --av-header-h: 58px;
  --av-sidebar-w: 300px;
}

/* ---------- Temel / tipografi ---------- */
.av-scope, body.av-body { background: var(--av-bg); color: var(--av-text); font-family: var(--av-font); }
.av-body { margin: 0; font-size: 15px; line-height: 1.55; -webkit-font-smoothing: antialiased; }
.av-body *, .av-scope * { box-sizing: border-box; }

.av-h1, .av-body h1 { font-size: 32px; font-weight: 700; line-height: 1.15; letter-spacing: -.02em; color: var(--av-text); margin: 0 0 12px; font-family: var(--av-font); }
.av-h2, .av-body h2 { font-size: 22px; font-weight: 700; line-height: 1.25; letter-spacing: -.01em; color: var(--av-text); margin: 0 0 10px; font-family: var(--av-font); }
.av-h3, .av-body h3 { font-size: 17px; font-weight: 600; line-height: 1.3; color: var(--av-text); margin: 0 0 8px; font-family: var(--av-font); }
.av-lead { font-size: 16px; color: var(--av-text-2); line-height: 1.6; }
.av-muted { color: var(--av-text-2); }
.av-body a { color: var(--av-cyan); text-decoration: none; }
.av-body a:hover { text-decoration: underline; }

/* ---------- Container / düzen ---------- */
.av-container { width: 100%; max-width: var(--av-container-max); margin: 0 auto; padding-left: var(--av-container-pad); padding-right: var(--av-container-pad); }
.av-container--narrow { max-width: var(--av-container-narrow); }

/* ---------- Logo (mavi gradyan "AI" + beyaz "Vergi") ---------- */
.av-logo { font-family: var(--av-font); font-size: 20px; font-weight: 800; letter-spacing: -.02em; color: var(--av-text); text-decoration: none; display: inline-flex; align-items: baseline; line-height: 1; }
.av-logo .ai { background: var(--av-grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; }
.av-logo .rest { color: var(--av-text); margin-left: 2px; }
.av-logo:hover { text-decoration: none; }

/* ---------- Header (ortak üst bar — düz, hover'da alt çizgi) ---------- */
.av-header { position: sticky; top: 0; z-index: 100; height: var(--av-header-h); display: flex; align-items: center; background: rgba(10,10,11,.78); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--av-border); }
.av-header__inner { width: 100%; max-width: var(--av-container-max); margin: 0 auto; padding: 0 var(--av-container-pad); display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.av-nav { display: flex; align-items: center; gap: 4px; }
.av-nav a { color: var(--av-text-2); font-size: 14px; font-weight: 500; padding: 8px 12px; border-radius: 8px; text-decoration: none; border-bottom: 2px solid transparent; transition: color .15s ease, border-color .15s ease; }
.av-nav a:hover { color: var(--av-text); text-decoration: none; border-bottom-color: var(--av-cyan); }
@media (max-width: 640px) { .av-nav a { padding: 6px 8px; font-size: 13px; } }

/* ---------- Butonlar ---------- */
.av-btn, .av-btn-secondary, .av-btn-ghost { font-family: var(--av-font); font-size: 14px; font-weight: 600; line-height: 1; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 16px; border-radius: var(--av-radius-sm); cursor: pointer; border: 1px solid transparent; transition: filter .15s ease, transform .05s ease, background .15s ease; text-decoration: none; }
.av-btn { background: var(--av-grad); color: var(--av-on-accent) !important; border: none; }
.av-btn * { color: var(--av-on-accent) !important; }
.av-btn:hover { filter: brightness(1.08); text-decoration: none; }
.av-btn:active { transform: translateY(1px); }
.av-btn-secondary { background: var(--av-surface); color: var(--av-text); border: 1px solid var(--av-border); }
.av-btn-secondary:hover { background: var(--av-surface-2); border-color: var(--av-text-3); text-decoration: none; }
.av-btn-ghost { background: transparent; color: var(--av-text); border: 1px solid var(--av-border); }
.av-btn-ghost:hover { background: var(--av-surface); text-decoration: none; }
.av-btn:focus-visible, .av-btn-secondary:focus-visible, .av-btn-ghost:focus-visible { outline: 2px solid var(--av-cyan); outline-offset: 2px; }
.av-btn .av-ic, .av-btn-secondary .av-ic, .av-btn-ghost .av-ic { width: 16px; height: 16px; flex: 0 0 auto; }

/* ---------- Yasal Uyarı bileşeni (.legal-notice) ---------- */
.legal-notice { display: flex; gap: 10px; align-items: flex-start; text-align: left; background: var(--av-amber-bg); border: 1px solid var(--av-amber-border); border-left: 4px solid var(--av-amber); border-radius: var(--av-radius-sm); padding: 14px 16px; margin: 0 0 24px; }
.legal-notice .ln-ic { flex: 0 0 auto; font-size: 17px; line-height: 1.4; }
.legal-notice .ln-bd { font-size: 14px; line-height: 1.55; }
.legal-notice .ln-tt { display: block; font-weight: 700; color: var(--av-amber); margin-bottom: 2px; }
.legal-notice .ln-tx { color: #f1e9d2; }   /* amber zeminde WCAG AA için açık ton */

/* ---------- Geliştirici / iletişim kartı (.av-dev-card) ---------- */
.av-dev-card { display: flex; align-items: center; gap: 12px; background: var(--av-surface); border: 1px solid var(--av-border); border-radius: var(--av-radius); padding: 14px 16px; }
.av-dev-card__avatar { flex: 0 0 auto; width: 42px; height: 42px; border-radius: var(--av-radius-pill); background: var(--av-grad); color: var(--av-on-accent); font-weight: 800; font-size: 16px; display: flex; align-items: center; justify-content: center; letter-spacing: -.01em; }
.av-dev-card__meta { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.av-dev-card__name { font-weight: 700; font-size: 14px; color: var(--av-text); }
.av-dev-card__title { font-size: 12.5px; color: var(--av-text-2); }
.av-dev-card__links { display: flex; gap: 12px; margin-top: 4px; }
.av-dev-card__links a { font-size: 12.5px; color: var(--av-cyan); text-decoration: none; }
.av-dev-card__links a:hover { text-decoration: underline; }

/* ---------- Footer (ortak) ---------- */
.av-footer { margin-top: var(--av-space-7); border-top: 1px solid var(--av-border); background: var(--av-surface-2); }
.av-footer__grid { max-width: var(--av-container-max); margin: 0 auto; padding: 40px var(--av-container-pad) 24px; display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 36px; }
.av-footer__brand p { font-size: 13.5px; color: var(--av-text-3); max-width: 340px; margin: 10px 0 0; line-height: 1.6; }
.av-footer__col h4 { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--av-text-2); margin: 0 0 14px; font-weight: 600; }
.av-footer__col a { display: block; font-size: 14px; color: var(--av-text-3); padding: 6px 0; text-decoration: none; }
.av-footer__col a:hover { color: var(--av-cyan); text-decoration: none; }
.av-footer__bottom { max-width: var(--av-container-max); margin: 0 auto; padding: 18px var(--av-container-pad) 28px; border-top: 1px solid var(--av-border); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; }
.av-footer__bottom .copy { font-size: 13px; color: var(--av-text-3); }
.av-footer__bottom .flinks { display: flex; gap: 18px; }
.av-footer__bottom .flinks a { font-size: 13px; color: var(--av-text-3); text-decoration: none; }
.av-footer__bottom .flinks a:hover { color: var(--av-text); }
.av-footer__note { max-width: var(--av-container-max); margin: 0 auto; padding: 0 var(--av-container-pad) 28px; font-size: 12px; color: var(--av-text-3); line-height: 1.6; opacity: .9; }
@media (max-width: 720px) { .av-footer__grid { grid-template-columns: 1fr; gap: 26px; } }